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  • 101.
    Modin, SA
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, PG
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Rapid access to enantiopure bicyclic diamines via aza-Diels-Alder reaction of iminoamides2000In: JOURNAL OF ORGANIC CHEMISTRY, ISSN 0022-3263, Vol. 65, no 20, p. 6736-6738Article in journal (Refereed)
  • 102.
    Modin, Stefan
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Organisk kemi.
    Pinho, Pedro
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Organisk kemi.
    Bicyclic O, P ligands for catalytic asymmetric 1,4-additon to a , b-unsaturated ketones.2004In: Adv. Synth. Catal., no 346, p. 549-553Article in journal (Refereed)
  • 103. Morikawa, Kouhei
    et al.
    Park, Jeonghan
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Hashiyama, Tomiki
    Sharpless, K. Barry
    Catalytic Asymmetric Dihydroxylation of Tetrasubstituted Oelfins1993In: J. Am. Chem. Soc., no 115, p. 8463-8464Article in journal (Refereed)
  • 104. Murakami, Masahiro
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Suginome, Michinori
    Ito, Yoshihiko
    Intramolecular Bis-Silylation of Carbon -Carbon Double Bonds Leading to Stereoselective Synthesis of 1,2,4-Triols1991In: J. Am. Chem. Soc, no 113, p. 3987-3988Article in journal (Refereed)
  • 105. Murakami, Masahiro
    et al.
    Suginome, Michinori
    Fujimoto, Kenzo
    Nakamura, Hiroshi
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Ito, Yoshihiko
    Stereoselective Intramolecular Bis-Silylation of Alkenes Promoted by a Palladium-Isocyanide Catalyst Leading to Polyol Synthesis1993In: Stereoselective Intramolecular Bis-Silylation of Alkenes Promoted by a Palladium-Isocyanide Catalsyst Leading to Polyol Synthesis, no 115, p. 6487-6498Article in journal (Refereed)
  • 106. Nilsson, Ylva
    et al.
    Aranyos, Attila
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-E.
    Parrain, Jean-Luc
    Ploteau, Christelle
    Quintard, Jean-Paul
    Synthesis of Theaspirone and Vitispirane via Palladium(II)-Catalyzed Oxaspirocyclization1996In: J. Org. Chem, Vol. 61, no 5, p. 1825-1829Article in journal (Refereed)
  • 107. Nilsson, Ylva
    et al.
    Gatti, Roberto
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-E.
    Palladium(II)-Catalyzed Carbocyclization: Vinylpalladium in 1,4-Oxidation of Conjugated Dienes1996In: Tetrahedron, Vol. 52, no 21, p. 7511-7523Article in journal (Refereed)
  • 108. Nilsson, Ylva I. M.
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-E.
    Example of Theromodynamic Control in Palladium-Catalyzed Allylic Alkylation. Evidence for Palladium-Assisted Allylic C-C Bond Cleavage1993In: J. Am. Chem. Soc., no 115, p. 6609-6613Article in journal (Refereed)
  • 109.
    Nordin, Sofia
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Roth, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Tarnai, Tibor
    Alonso, Diego
    Brandt, Peter
    Andersson, Pher
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Remote Dipole Effects as a Means to Accelerate [Ru(amino alcohol)]-Catalyzed Transfer Hydrogenation of Ketones2001In: Chem. Eur. J., no 7, p. 1431-1436Article in journal (Refereed)
    Abstract
  • 110.
    Norgren, Anna
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Zhang, Suode
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Arvidsson, Per
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Synthesis and circular dichroism spectroscopic investigations of oligomeric β-peptoids with α-chiral side chains2006In: Organic Letters, ISSN 1523-7060, E-ISSN 1523-7052, Vol. 8, no 20, p. 4533-4536Article in journal (Refereed)
    Abstract [en]

    Biomimetic oligomers are of large interest both as targets for combinatorial and parallel synthetic efforts and as foldamers. For example, shorter peptoid derivatives of beta-peptides, i.e., oligo-N-substituted beta-Ala, have been described as potential lead structures. Herein, we describe a solid-phase synthetic route to beta-peptoids with alpha-chiral aromatic N-substituents up to 11 residues long. Furthermore, the folding propensities of these oligomers were investigated by circular dichroism (CD) spectroscopy.

  • 111.
    Nájera, Carmen
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry.
    Yus, Miguel
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry.
    Karlsson, Ulrika
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry.
    Gogoll, Adolf
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-Erling
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry.
    Nitroselenation of conjugated dienes: Preparation of 3,4-epoxy-3-nitro-1-alkenes1990In: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 31, no 29, p. 4199-4202Article in journal (Refereed)
    Abstract [en]

    Conjugated dienes were transformed to synthetically useful 3,4-epoxy-3-nitro-1-alkenes via a nitroselenation-oxidation sequence.

    Conjugated dienes were transformed to synthetically useful 3,4-epoxy-3-nitroalkenes via a nitroselenation-oxidation sequence.

  • 112. O'Donnell, Martin J.
    et al.
    Zhou, Changyou
    Mi, Aiqiao
    Chen, Ning
    Kyle, Jeffrey A.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Palladium-Catalyzed Reaction of a Malonate Anion with a Glycine Cation Equivalent: Bis-Phosphine Ligands and in situ Catalyst Formation1995In: Tetrahedron Letters, Vol. 36, no 24, p. 4205-4208Article in journal (Refereed)
  • 113.
    Paptchikhine, Alexander
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Cheruku, Pradeep
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Engman, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Andersson, Pher G
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
    Iridium-catalyzed enantioselective hydrogenation of vinyl boronates2009In: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, no 40, p. 5996-5998Article in journal (Refereed)
    Abstract [en]

    The first Ir-catalyzed asymmetric hydrogenations of vinyl boronates have been performed using low catalyst loadings (0.5 mol%) and pressure (as low as 1 bar). Good selectivities (76-98% ee) were obtained for a range of substrates.

  • 114.
    Pinho, Pedro
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    A novel synthesis of chiral cyclopentyl- and cyclohexyl-amines1999In: Chem. Commun., no 597-598Article in journal (Refereed)
  • 115.
    Pinho, Pedro
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Guijarro, David
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    (1S, 3R, 4R)-2-Azanorbornyl-3-methanol Oxazaborolidines in the Asymmetric Reduction of Ketones1998In: Tetrahedron, no 54, p. 7897-7906Article in journal (Refereed)
  • 116. Reitzel, Kasper
    et al.
    Ahlgren, Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry.
    Gogoll, Adolf
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Jensen, Henning
    Rydin, Emil
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Limnology.
    Characterization of phosphorus in sequential extracts from lake sediments using P-31 nuclear magnetic resonance spectroscopy2006In: Canadian Journal of Fisheries and Aquatic Sciences, ISSN 0706-652X, E-ISSN 1205-7533, Vol. 63, no 8, p. 1686-1699Article in journal (Refereed)
    Abstract [en]

    Phosphorus (P) compounds in three different lake surface sediments were extracted by sequential P extraction and identified by P-31 nuclear magnetic resonance (P-31 NMR) spectroscopy. The extraction procedure primarily discriminates between inorganic P-binding sites but most extraction steps also contained P not reacting (nrP) with the molybdenum complex during P analyses. In all three lakes, the nrP dominated in the NaOH extracts. Nonreactive P from the dystrophic lake was dominated by potentially recalcitrant P groups such as orthophosphate monoesters, while the nrP in the two more productive lakes also contained polyphosphates, pyrophosphate, and organic P groups such as P lipids and DNA-P that may be important in remineralization and recycling to the water column. In addition, polyphosphates showed substantial dynamics in settling seston. The Humic-P pools (P associated with humic acids) showed strong signals of orthophosphate monoesters in all three lakes, which supported the assumption that P-containing humic compounds are indeed recovered in this fraction, although other organic P forms are also present. Thus, in addition to expanding the understanding of which organic P forms that are present in lake sediments, the P-31 NMR technique also demonstrated that the chemical extraction procedure may provide some quantification of recalcitrant versus labile organic P forms.

  • 117. Reitzel, Kasper
    et al.
    Ahlgren, Joakim
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry. Analytisk kemi.
    Gogoll, Adolf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology.
    Rydin, Emil
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical and Analytical Chemistry, Analytical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Faculty of Science and Technology, Biology, Department of Ecology and Evolution, Limnology. Limnologi.
    Effects of aluminum treatment on phosphorus, carbon, and nitrogen distribution in lake sediment: A 31P NMR study2006In: Water Research, no 40, p. 647-654Article in journal (Refereed)
    Abstract [en]

    The effects of aluminum (A1) treatment on sediment composition of carbon (C), nitrogen (N) and phosphorus (P) were investigated in sediment representing pre- and post-treatment years in the Danish Lake Sönderby. 31P NMR spectroscopy analysis of EDTA-NaOH extracts revealed six functional P groups. Direct effects of the A1 treatment were reflected in the othophosphate profile revealing increased amounts of A1-P in the sediment layers representing the post-treatment period, as well as changes in organic P groups due to precipitation of phytoplankton and bacteria at the time of A1 additon. Furthermore, changes in phytoplankton community structure and lowered production due to the A1 treatment resulted in decreased concentrations of sediment organic P groups and total C. Exponential regressions were used to describe the diagensisi of C, N, and P in the sediment. From these regressions , half-life degradation times and C, N, and P burial rates were determined.

  • 118.
    Roth, Peter
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Somfai, Peter
    Asymmetric reduction of azirines; a new route to chiral aziridines2002In: Chem. Commun., p. 1752-1753Article in journal (Refereed)
  • 119. Rönn, Magnus
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-E
    Application of O2-DMSO as Reoxidant in the Pd(II)-Catalyzed 1,4-Oxidation of 5-Substituted 1,3-Cyclohexadienes1997In: Acta Chemica Scandinavica, no 51, p. 773-777Article in journal (Refereed)
  • 120. Rönn, Magnus
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-E.
    Enantiocontrolled Formal Total Synthesis of Paeonilactone A and B from (S)-(+)-Carvone1998In: Acta Chemica Scandinavica, no 52, p. 524-527Article in journal (Refereed)
  • 121. Rönn, Magnus
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-E
    The Use of Stabilized Carbon Nucleophiles in Palladium(II)-Catalyzed 1,4-Oxidation of Conjugated Dienes1997In: Tetrahedron Letters, Vol. 38, no 20, p. 3603-3606Article in journal (Refereed)
  • 122.
    Rönn, Magnus
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Bäckvall, Jan-Erling
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Palladium(II)-catalyzed cyclization using molecular oxygen as reoxidant1995In: Tetrahedron Letters, Vol. 36, no 42, p. 7749-7752Article in journal (Refereed)
  • 123.
    Shanks, David
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Engman, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Pach, Mayte
    Norrby, Thomas
    Probing the antioxidative properties of combinations of an organotellurium compound, BHT and thiol in oil2006In: Lubrication Science, ISSN 0954-0075, E-ISSN 1557-6833, Vol. 18, no 2, p. 87-94Article in journal (Refereed)
    Abstract [en]

    Differential scanning calorimetry experiments with an unsaturated polyolester oil at 190˚C showed that an organotellurium compound in combination with a thiol or a sterically hindered phenol (BHT) could act in a synergistic fashion to protect the material form oxidation. Under more realistic conditions for an oil antioxidant (elevated temperature in the presence of oxygen, water and a copper coil; rotating pressure vessel oxidation test) the antioxidant protection offered by BHT itself at similar concentrations. In order for the novel antioxidant systems to become useful for protection of oils and fluids, more robust organotellurium compounds must be prepared.

  • 124.
    Shanks, David
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry II. Organisk kemi.
    Frisell, Håkan
    Ottosson, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry II. Organisk kemi.
    Engman, Lars
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry II. Organisk kemi.
    Design principles for a-tocopherol analogues2006In: Organic and biomolecular chemistry, ISSN 1477-0520, E-ISSN 1477-0539, Vol. 4, p. 846-852Article in journal (Refereed)
    Abstract [en]

    An (RO)B3LYP/LANL2DZdp//B3LYP/LANL2DZ model for the prediction of the homolytic bond dissociation enthalpy (BDE) and adiabatic ionisation potential (IP) of phenolic antiocidants containing heavy chalcogens has been developed. The model has been used to probe the relationship between geometry, chalcogen substitution and activity for a series of a-tocopherol analogues of varying ring size. From this, a series of design principles for cyclic antioxidants has emerged, embodied by the compound 4-hydroxy-2,2,3,5,6-pentamethylbenzoselenete (4c). This compound is predicted to have a BDE comparable to a-tocopherol, and should act in a dual chain-breaking and hydroperoxide-decomposing manner, by analogy with other selenide antioxidants. The stability of chalcogen-substituted benzoxetes was considered, and the as yet unsynthesised benzotelluretes are predicted to be stable. Finally, an attempt was made to determine antioxidant mechanism by considering calculated BDE and IP data together with experimental rate data.

  • 125. Smirnova, Joulia
    et al.
    Engman, Lars
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Organisk kemi.
    Andersson, Carl-Magnus
    Malm, Johan
    An organoiron approach to thyroid hormone analogues2005In: Journal of Organo metallic Chemistry, Vol. 690, p. 1784-1792Article in journal (Refereed)
    Abstract [en]

    An approach to thyroid hormone analogues was proposed involving sequential substitution of cationic cyclopentadienyl(1.4-dichlorobenzene)iron(II) complexes with phenoxide/thiophenoxide and hydroxide/amine, followed by decomplexation. Although the selectivity for monosubstitution with phenolates and thiophenolates was poorer than previously observed, it was often possible to control the reaction with sterically less demanding phenolates of intermediate nucleophilicity. The subsequent introduction of a polar substituent into the monosubstituted product was successful with amine nucleophiles. A modified approach, based on the reverse order of substitution was also attempted. Whereas clean monosubstitution with hydroxide/hydroxide equivalents was unsuccessful, cyclopentadienyl(N-alkyl-1-chloro-4-aminobenzene)iron(II) complexes could be prepared in fair yields and further substituted with nucleophiles such as thiophenolates.

  • 126. Stuhr-Hansen, Nicolai
    et al.
    Beckers, Edwin H. A.
    Engman, Lars
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. organisk kemi.
    Janssen, René A.J.
    Organoselenium-Substituted Poly(p-phenylenevinylene)2005In: Heteroatom Chemistry, Vol. 16, no 7, p. 656-662Article in journal (Refereed)
    Abstract [en]

    A new type of conjugated polymer, organoselenium substituted poly(p-pheylenevinylene) (PPV), was synthesized from the corresponding alkylselenenyl p-xylylene dibromide via a Gilch route using potassium tert-butoxide in THF. The p-xylylene dibromide precursors were synthesized by reacting lithiated bis(methoxymethyl)benzenes with elemental selenium, followed by alkylation of the generated selenolates. As a final demasking step, the bromomethyl functions were liberated by ether cleavage using boron tribromide. Bis-alkylselenenyl PPV was obtained with an average molecular weight Mw of approximately 300,000 g/mol and with polydispersity Mw/Mn=2. Due to low solubility, monoalkylselenenyl PPV was obtained with a considerably lower average molecular weight in the proximity of 16,000 g/mol and with a polydispersity slightly larger than 3. Absorption and flourescence spectroscopy revealed that the bis-alkylselenenyl PPV is extensively conjugated.

  • 127. Södergren, Mikael
    et al.
    Alonso, Diego
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Readily available nitrene precursors increase the scope of Evans' asymmetric aziridination of olefins1997In: Tetrahedron Asymmetry, Vol. 8, no 21, p. 3563-3565Article in journal (Refereed)
  • 128. Södergren, Mikael
    et al.
    Alonso, Diego
    Bedekar, Ashutosh V.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Preparation and Evaluation of Nitrene Precursors (PhI=NSO2Ar) for the Copper-Catalyzed Aziridiantion of Olefins1997In: Tetrahedron Letters, Vol. 38, no 39, p. 6897-6900Article in journal (Refereed)
  • 129. Södergren, Mikael
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Chiral, Bicyclic Proline Derivatives and their Application as Ligands for Copper in the Catalytic Asymmetric Allylic Oxidation of Olefins1996In: Tetrahedron Letters, Vol. 37, no 42, p. 7577-7580Article in journal (Refereed)
  • 130.
    Södergren, Mikael
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    New and Highly Enantioselective Catalysts for the Rearrangement of Meso-Epoxides into Chiral Allylic Alcohols1998In: J. Am. Chem., no 120, p. 10760-10761Article in journal (Refereed)
  • 131. Södergren, Mikael
    et al.
    Bertilsson, Sophie
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Allylic Alcohols via Catalytic Asymmetric Epoxide Rearrangement2000In: J. Am. Chem. Soc., no 122, p. 6610-6619Article in journal (Refereed)
  • 132. Tanner, David
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Harden, Adrian
    Somfai, Peter
    C2-Symmetric Bis(Aziridines): A New Class of Chiral Ligands for Transition Metal-Mediated Asymmetric Synthesis1994In: Tetrahedron Letters, Vol. 35, no 26, p. 4631-4634Article in journal (Refereed)
  • 133. Tanner, David
    et al.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Tedenborg, Lars
    Somfai, Peter
    A Synthetic Approach to the Zoanthamine Alkaloids1994In: Tetrahedron, Vol. 50, no 30, p. 9135-9144Article in journal (Refereed)
  • 134. Tanner, David
    et al.
    Harden, Adrian
    Johansson, Fredrik
    Wyatt, Paul
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Asymmetric Catalysis via Chiral Aziridines1996In: Acta Chemica Scandinavica, no 50, p. 361-368Article in journal (Refereed)
  • 135. Tanner, David
    et al.
    Johansson, Fredrik
    Harden, Adrian
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    A Comparative Study of C2-Symmetric Bis(aziridine) Ligands in Some Transition Metal-Mediated Asymmetric Transformations1998In: Tetrahedron, no 54, p. 15731-15738Article in journal (Refereed)
  • 136. Tanner, David
    et al.
    Kornö, Hanne
    Guijarro, David
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Aziridino Alcohols as Catalysts for the Enantioselective Addition of Diethylzinc to Aldehydes1998In: Tetrahedron, no 54, p. 14213-14232Article in journal (Refereed)
  • 137. Tanner, David
    et al.
    Tedenborg, Lars
    Almario, Antonio
    Pettersson, Ingrid
    Csöregh, Ingeborg
    Kelly, Nicholas
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Högberg, Thomas
    Total Synthesis of Balanol, Part 2. Completion of the Synthesis and Investigation of the Structure and Reactivity of Two Key Heterocyclic Intermediates1997In: Tetrahedron, Vol. 53, no 13, p. 4857-4868Article in journal (Refereed)
  • 138. Tanner, David
    et al.
    Wyatt, Paul
    Johansson, Fredrik
    Bertilsson, Sophie
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Studies on a Chiral (N,P) Ligand Containing a C2 -Symmetric Aziridine Unit1999In: Acta Chemica Scandinavica, no 53, p. 263-269Article in journal (Refereed)
  • 139. Temme, Oliver
    et al.
    Taj, Shabbir-Ali
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Highly Enantioselective Intermolecular Cu(I)-Catalyzed Cyclopropanation of Cyclic Enol Ethers. Asymmetric Total Synthesis of (+)-Querbrachamine1998In: J. Org. Chem., no 63, p. 6007-6015Article in journal (Refereed)
  • 140.
    Trifonova, Anna
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Biochemistry and Organic Chemistry. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Diesen, Jarle
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Biochemistry and Organic Chemistry. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Biochemistry and Organic Chemistry. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Asymmetric Hydrogenation of Imines and Olefins Using Phosphine-Oxazoline Iridium Complexes as Catalysts2006In: Chem. Eur. J., no 12, p. 2318-2328Article in journal (Refereed)
  • 141.
    Trifonova, Anna
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Diesen, Jarle
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Chapman, Christopher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I.
    Application of Phosphine-Oxazoline Ligands in Ir-Catalyzed Asymmetric Hydrogenation of Acyclic Aromatic N-Arylimines2004In: Organic Letters, Vol. 6, no 21, p. 3825-3827Article in journal (Refereed)
  • 142.
    Trifonova, Anna
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Organisk kemi.
    Magnus, A.
    Andersson, Pher
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Organisk kemi.
    The use of nonactivated iminodienophiles in the stereoselective aza-Diels-Alder reaction2004In: Tetrahedron Asymmetry, no 15, p. 445-452Article in journal (Refereed)
  • 143.
    Wallin, Staffan
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics.
    Davidsson, Jan
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics.
    Modin, Judit
    Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics. Organisk kemi.
    Hammarström, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics.
    Femtosecond Transient Absorption Anisotropy Study on [Ru(bpy)3]2+ and [Ru(bpy)(py)4]2+. Ultrafast Interligand Randomization of the MLCT State2005In: J. Phys. Chem. A, no 109, p. 4697-4704Article in journal (Refereed)
    Abstract [en]

    It is known that the relaxed excited state of [Ru(bpy)3]2+ is best described as a metal to ligand charge transfer (MLCT) state having one formally reduced bipyridine and two neutral. Previous reports have suggested [Malone, R. et al. J.Chem. Phys 1991, 95, 8970] that the electron "hops" from ligand to ligand in the MLCT state with a time constant of about 50 ps in acetonitrile. However, we have done transient absorption anisotropy measurements indicating that already after one picosecond the molecule has no memory of which bipyridine was initially photoselected, which suggest an ultrafast interligand randomization of the MLCT state.

  • 144.
    Zhang, Suode
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Avd för organisk kemi.
    Govender, Thavendran
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Avd för organisk kemi.
    Norström, Thomas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Avd för organisk kemi.
    Arvidsson, Per
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Avd för organisk kemi.
    An Improved Synthesis of Fmoc-N-methyl-a-amino Acids2005In: J. Org. Chem., no 70, p. 6918-6920Article in journal (Refereed)
123 101 - 144 of 144
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